Kress

Kress Robot Lawnmowers Error Codes

Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.

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E1
Robot mower will not start mowing; display shows E1 shortly after power‑up or when starting a job.
Emergency Stop / Stop Button Activated
E10
Robot mower shows E10 and will not start; often after battery replacement or long storage.
Battery Communication / Battery Pack Error
E11
Robot mower displays E11 and does not charge when docked on the charging station.
Charging Station / Charging Circuit Error
E12
Robot mower shows E12 and stops near the boundary wire; may not detect the wire correctly.
Boundary Wire Signal Missing / Weak
E13
Robot mower displays E13 and behaves erratically near the boundary; sometimes crosses the wire.
Boundary Sensor / Loop Receiver Fault
E14
Robot mower shows E14 and stops; often related to internal electronics overheating.
Overtemperature Protection / Electronics Overheat
E15
Robot mower displays E15 and will not start; often after firmware update or power surge.
Main Control Board Communication / Firmware Error
E16
Robot mower shows E16 and stops; may be associated with GPS‑enabled Kress models losing position.
GPS / Positioning Module Error
E17
Robot mower displays E17 and may not connect to the mobile app or cloud services.
Wi‑Fi / Connectivity Module Error
E18
Robot mower shows E18 and stops; often related to rain sensor or weather protection.
Rain Sensor Activated or Faulty
E19
Robot mower displays E19 and may not dock correctly or may overshoot the charging station.
Docking Alignment / Guide Signal Error
E2
Robot mower stops and displays E2 when lifted or when driving over uneven ground; may not resume even when placed back on the lawn.
Lift Sensor / Tilt Sensor Activated or Faulty
E20
Robot mower shows E20 and stops; may be associated with internal clock or schedule issues.
Real‑Time Clock / Scheduling Error
E3
Robot mower displays E3 and stops; often occurs when the mower is on a slope or after bumping into an obstacle.
Roll-Over / Excessive Tilt Detected
E4
Robot mower shows E4 and will not start mowing; error appears immediately after pressing START.
Blade Motor Overload / Blocked Cutting Disc
E5
Robot mower stops with E5 during mowing; may occur in tall or wet grass and sometimes resumes after a restart.
Blade Motor Overcurrent / Overload Protection
E6
Robot mower displays E6 and refuses to start; often after a collision or when the front bumper is stuck.
Front Bumper / Collision Sensor Fault
E7
Robot mower shows E7 and stops; often associated with one wheel not turning or the mower spinning in circles.
Left Drive Motor Fault / Stall
E8
Robot mower shows E8 and may pivot in circles; right wheel may not drive correctly.
Right Drive Motor Fault / Stall
E9
Robot mower displays E9 and stops; often occurs when the mower is stuck or cannot move forward or backward.
Drive System Blocked / Stuck Mower
Symptom
Robot mower cannot be paired or discovered by the Kress mobile app via Bluetooth.
Bluetooth Pairing / Radio Fault
Symptom
Robot mower does not return to the charging station at the end of a job; stops in the lawn with low battery.
Return‑to‑Base / Navigation Failure
Symptom
Robot mower does not start at all; no display, no lights, completely dead.
No Power / Dead Mower
Symptom
Robot mower frequently gets stuck on small obstacles or at lawn edges.
Poor Obstacle Handling / Ground Clearance Issue
Symptom
Robot mower is leaking oil or grease from the wheel area.
Drive Gearbox Seal Failure
Symptom
Robot mower is very noisy during operation; grinding or rattling sounds from underneath.
Mechanical Noise / Worn Bearings
Symptom
Robot mower leaves tracks or scalps the lawn in certain areas.
Incorrect Cutting Height / Chassis Level
Symptom
Robot mower leaves uncut grass tufts and the cut quality is poor or ragged.
Dull Blades / Poor Cutting Performance
Symptom
Robot mower randomly restarts or reboots during operation without showing an error code.
Intermittent Electronics Reset
Symptom
Robot mower runs but leaves uncut strips of grass or misses areas within the boundary.
Poor Coverage / Navigation Pattern Issue
Symptom
Robot mower shows signs of water inside the housing or fogging under the display window.
Water Ingress / Seal Failure
Symptom
Robot mower smells of burnt plastic or electrical odor during or after operation.
Overheating Component / Electrical Burn
Symptom
Robot mower starts but stops after a few seconds without showing a specific error code.
Intermittent Power Loss / Loose Connection
Symptom
Robot mower vibrates excessively or bounces while mowing.
Excessive Vibration / Unbalanced Cutting System
Symptom
Robot mower's boundary wire connectors frequently corrode or fail, causing intermittent boundary detection.
Boundary Connection Corrosion
Symptom
Robot mower's clock and settings reset every time power is turned off.
Backup Power / Memory Retention Failure
Symptom
Robot mower's display or keypad does not respond to button presses.
User Interface / Keypad Failure
Symptom
Robot mower's front cover or service hatch will not close properly, leaving gaps.
Housing / Latch Misalignment
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